document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=777529>Question 777529</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 121 = 100 * (1 + x)^2, solving for x. \r<BR>\n" );
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document.write( "So far, I've come down to this expression...\r<BR>\n" );
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document.write( "121 = 100 * (1 + x)(1 + x)\r<BR>\n" );
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document.write( "121/100 = 1 + x + x + x^2\r<BR>\n" );
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document.write( "121/100 = 1 + 2x + x^2\r<BR>\n" );
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document.write( "To get rid of the 1...<BR>\n" );
document.write( "Multiply the 100 again...\r<BR>\n" );
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document.write( "121 = 100 + 200x + 200x^2\r<BR>\n" );
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document.write( "Subtract the 100 on both sides...\r<BR>\n" );
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document.write( "21 = 200x + 200x^2\r<BR>\n" );
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document.write( "Divide by 200...\r<BR>\n" );
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document.write( ".105 = x + x^2\r<BR>\n" );
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document.write( "This is where I'm stuck with above.<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #474137 by </B><A HREF=/tutors/aboutme.mpl?userid=1998Baby><B>1998Baby(63)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=1998Baby><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=474137\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 121=100*(1+x)^2<BR>\n" );
document.write( "121=100*(1+x)(1+x)<BR>\n" );
document.write( "this is where you went wrong. you have to do parenthesis first.<BR>\n" );
document.write( "121=100*(x^2+2x+1)<BR>\n" );
document.write( "121=(100x+100)(x+1)<BR>\n" );
document.write( "121=100x^2+100x+100x+100<BR>\n" );
document.write( "121=100x^2+200x+100<BR>\n" );
document.write( "-121___________-121<BR>\n" );
document.write( "0=100x^2+200x-21<BR>\n" );
document.write( "you have to then multiply 100 and -21.<BR>\n" );
document.write( "you get -2100. you then have to find two numbers that when added equal 200 and when multiplied equal -2100. the numbers are 210 and -10.<BR>\n" );
document.write( "the you put them in the equation like so.<BR>\n" );
document.write( "0=100x^2+210x-10x-21<BR>\n" );
document.write( "then you factor by grouping.<BR>\n" );
document.write( "you get:0=10x(10x+21)-1(10x+21)<BR>\n" );
document.write( "if you did it correctly you should get the same number in the parenthesis.<BR>\n" );
document.write( "then you ass the 10x and the -1 together<BR>\n" );
document.write( "0=(10x+21)(10x-1)<BR>\n" );
document.write( "then you separate the problem into: 10x+21=0 and 10x-1=0 and solve them<BR>\n" );
document.write( "10x+21=0<BR>\n" );
document.write( "subtract 21 to 0<BR>\n" );
document.write( "10x=-21<BR>\n" );
document.write( "divide 10 to -21<BR>\n" );
document.write( "x=-21/10<BR>\n" );
document.write( "but your not done because you still have to do 10x-1=0<BR>\n" );
document.write( "10x-1=0<BR>\n" );
document.write( "add 1 to 0<BR>\n" );
document.write( "10x=1<BR>\n" );
document.write( "divide 10 to 1<BR>\n" );
document.write( "x=1/10<BR>\n" );
document.write( "____<BR>\n" );
document.write( "the two answers are x=1/10, and -21/10 </SPAN>\n" );
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